And I am so happy with seeing myself making progress!! BUT: Now I have a masterclass and a concert coming up in April. And my teacher suggested to play Schubert and the Ocean etude!I can play the etude decently at a slow tempo, but am still far away from the goal. Regards!
My opinion has more to do with my experience at master classes an little to do with your personal journey. Master classes are usually attended by students AND teachers who want to pick the brains of the highly skilled and gifted musicians who conduct them. People want insights into the music and, at times, insights into the more refined technical issues that performers face. Taking a piece that is not already at performance level is likely to degrade the master class, as the master who is conducting it will not be able to add these 'finishing touches' on a piece that is not really that close to being finished. I look at the master class experience as being just that, the finest polish that really takes a piece beyond typical and into rarefied air. Speaking for myself, I would never want to play anything that is still in the process of being sorted out in the basic learning process. It's like trying to skip a step or two in the process of polishing a gem.